A double tide refers to that rare occurrence when a low tide occurs twice within one span of daylight hours, at dawn and at dusk. Films depicting the act of labor are about as rare, outside of Sharon Lockhart’s oeuvre. Here, in two extended takes, she portrays a sole woman clam digger as she works in the mudflats on the coast of Maine. Lockhart’s roots in photography and interest in stillness are evident; the coastal landscape and primal work seem timeless, yet poignantly, we are invited to contemplate a traditional labor that is disappearing.